xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 4b73cfabac29092070ec658b51953a42b9eed8df) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.AsmVerbose)
152     Res.push_back("-masm-verbose");
153   if (!Opts.CodeModel.empty()) {
154     Res.push_back("-mcode-model");
155     Res.push_back(Opts.CodeModel);
156   }
157   if (!Opts.CXAAtExit)
158     Res.push_back("-fno-use-cxa-atexit");
159   if (Opts.CXXCtorDtorAliases)
160     Res.push_back("-mconstructor-aliases");
161   if (!Opts.DebugPass.empty()) {
162     Res.push_back("-mdebug-pass");
163     Res.push_back(Opts.DebugPass);
164   }
165   if (Opts.DisableFPElim)
166     Res.push_back("-mdisable-fp-elim");
167   if (!Opts.FloatABI.empty()) {
168     Res.push_back("-mfloat-abi");
169     Res.push_back(Opts.FloatABI);
170   }
171   if (!Opts.LimitFloatPrecision.empty()) {
172     Res.push_back("-mlimit-float-precision");
173     Res.push_back(Opts.LimitFloatPrecision);
174   }
175   if (Opts.NoZeroInitializedInBSS)
176     Res.push_back("-mno-zero-initialized-bss");
177   if (Opts.ObjCLegacyDispatch)
178     Res.push_back("-fobjc-legacy-dispatch");
179   if (Opts.SoftFloat)
180     Res.push_back("-msoft-float");
181   if (Opts.UnwindTables)
182     Res.push_back("-munwind-tables");
183   if (Opts.RelocationModel != "pic") {
184     Res.push_back("-mrelocation-model");
185     Res.push_back(Opts.RelocationModel);
186   }
187   if (!Opts.VerifyModule)
188     Res.push_back("-disable-llvm-verifier");
189 }
190 
191 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
192                                        std::vector<std::string> &Res) {
193   if (Opts.IncludeSystemHeaders)
194     Res.push_back("-sys-header-deps");
195   if (Opts.UsePhonyTargets)
196     Res.push_back("-MP");
197   if (!Opts.OutputFile.empty()) {
198     Res.push_back("-dependency-file");
199     Res.push_back(Opts.OutputFile);
200   }
201   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
202     Res.push_back("-MT");
203     Res.push_back(Opts.Targets[i]);
204   }
205 }
206 
207 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
208                                  std::vector<std::string> &Res) {
209   if (Opts.IgnoreWarnings)
210     Res.push_back("-w");
211   if (Opts.NoRewriteMacros)
212     Res.push_back("-Wno-rewrite-macros");
213   if (Opts.Pedantic)
214     Res.push_back("-pedantic");
215   if (Opts.PedanticErrors)
216     Res.push_back("-pedantic-errors");
217   if (!Opts.ShowColumn)
218     Res.push_back("-fno-show-column");
219   if (!Opts.ShowLocation)
220     Res.push_back("-fno-show-source-location");
221   if (!Opts.ShowCarets)
222     Res.push_back("-fno-caret-diagnostics");
223   if (!Opts.ShowFixits)
224     Res.push_back("-fno-diagnostics-fixit-info");
225   if (Opts.ShowSourceRanges)
226     Res.push_back("-fdiagnostics-print-source-range-info");
227   if (Opts.ShowColors)
228     Res.push_back("-fcolor-diagnostics");
229   if (Opts.VerifyDiagnostics)
230     Res.push_back("-verify");
231   if (Opts.BinaryOutput)
232     Res.push_back("-fdiagnostics-binary");
233   if (Opts.ShowOptionNames)
234     Res.push_back("-fdiagnostics-show-option");
235   if (Opts.ErrorLimit) {
236     Res.push_back("-ferror-limit");
237     Res.push_back(llvm::utostr(Opts.ErrorLimit));
238   }
239   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
240     Res.push_back("-ftabstop");
241     Res.push_back(llvm::utostr(Opts.TabStop));
242   }
243   if (Opts.MessageLength) {
244     Res.push_back("-fmessage-length");
245     Res.push_back(llvm::utostr(Opts.MessageLength));
246   }
247   if (!Opts.DumpBuildInformation.empty()) {
248     Res.push_back("-dump-build-information");
249     Res.push_back(Opts.DumpBuildInformation);
250   }
251   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
252     Res.push_back("-W" + Opts.Warnings[i]);
253 }
254 
255 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
256   switch (Kind) {
257   case FrontendOptions::IK_None:              break;
258   case FrontendOptions::IK_AST:               return "ast";
259   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
260   case FrontendOptions::IK_C:                 return "c";
261   case FrontendOptions::IK_CXX:               return "c++";
262   case FrontendOptions::IK_ObjC:              return "objective-c";
263   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
264   case FrontendOptions::IK_OpenCL:            return "cl";
265   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
266   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
267   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
268   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
269   }
270 
271   llvm_unreachable("Unexpected language kind!");
272   return 0;
273 }
274 
275 static const char *getActionName(frontend::ActionKind Kind) {
276   switch (Kind) {
277   case frontend::PluginAction:
278   case frontend::InheritanceView:
279     llvm_unreachable("Invalid kind!");
280 
281   case frontend::ASTDump:                return "-ast-dump";
282   case frontend::ASTPrint:               return "-ast-print";
283   case frontend::ASTPrintXML:            return "-ast-print-xml";
284   case frontend::ASTView:                return "-ast-view";
285   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
286   case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
287   case frontend::DumpTokens:             return "-dump-tokens";
288   case frontend::EmitAssembly:           return "-S";
289   case frontend::EmitBC:                 return "-emit-llvm-bc";
290   case frontend::EmitHTML:               return "-emit-html";
291   case frontend::EmitLLVM:               return "-emit-llvm";
292   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
293   case frontend::EmitObj:                return "-emit-obj";
294   case frontend::FixIt:                  return "-fixit";
295   case frontend::GeneratePCH:            return "-emit-pch";
296   case frontend::GeneratePTH:            return "-emit-pth";
297   case frontend::InitOnly:               return "-init-only";
298   case frontend::ParseNoop:              return "-parse-noop";
299   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
300   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
301   case frontend::PrintDeclContext:       return "-print-decl-contexts";
302   case frontend::PrintPreprocessedInput: return "-E";
303   case frontend::RewriteMacros:          return "-rewrite-macros";
304   case frontend::RewriteObjC:            return "-rewrite-objc";
305   case frontend::RewriteTest:            return "-rewrite-test";
306   case frontend::RunAnalysis:            return "-analyze";
307   case frontend::RunPreprocessorOnly:    return "-Eonly";
308   }
309 
310   llvm_unreachable("Unexpected language kind!");
311   return 0;
312 }
313 
314 static void FrontendOptsToArgs(const FrontendOptions &Opts,
315                                std::vector<std::string> &Res) {
316   if (!Opts.DebugCodeCompletionPrinter)
317     Res.push_back("-no-code-completion-debug-printer");
318   if (Opts.DisableFree)
319     Res.push_back("-disable-free");
320   if (Opts.RelocatablePCH)
321     Res.push_back("-relocatable-pch");
322   if (Opts.ShowHelp)
323     Res.push_back("-help");
324   if (Opts.ShowMacrosInCodeCompletion)
325     Res.push_back("-code-completion-macros");
326   if (Opts.ShowStats)
327     Res.push_back("-print-stats");
328   if (Opts.ShowTimers)
329     Res.push_back("-ftime-report");
330   if (Opts.ShowVersion)
331     Res.push_back("-version");
332 
333   bool NeedLang = false;
334   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
335     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
336         Opts.Inputs[i].first)
337       NeedLang = true;
338   if (NeedLang) {
339     Res.push_back("-x");
340     Res.push_back(getInputKindName(Opts.Inputs[0].first));
341   }
342   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
343     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
344            "Unable to represent this input vector!");
345     Res.push_back(Opts.Inputs[i].second);
346   }
347 
348   if (!Opts.OutputFile.empty()) {
349     Res.push_back("-o");
350     Res.push_back(Opts.OutputFile);
351   }
352   if (!Opts.ViewClassInheritance.empty()) {
353     Res.push_back("-cxx-inheritance-view");
354     Res.push_back(Opts.ViewClassInheritance);
355   }
356   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
357     Res.push_back("-fixit-at");
358     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
359                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
360                   llvm::utostr(Opts.FixItLocations[i].Column));
361   }
362   if (!Opts.CodeCompletionAt.FileName.empty()) {
363     Res.push_back("-code-completion-at");
364     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
365                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
366                   llvm::utostr(Opts.CodeCompletionAt.Column));
367   }
368   if (Opts.ProgramAction != frontend::InheritanceView &&
369       Opts.ProgramAction != frontend::PluginAction)
370     Res.push_back(getActionName(Opts.ProgramAction));
371   if (!Opts.ActionName.empty()) {
372     Res.push_back("-plugin");
373     Res.push_back(Opts.ActionName);
374   }
375   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
376     Res.push_back("-load");
377     Res.push_back(Opts.Plugins[i]);
378   }
379   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
380     Res.push_back("-ast-merge");
381     Res.push_back(Opts.ASTMergeFiles[i]);
382   }
383 }
384 
385 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
386                                    std::vector<std::string> &Res) {
387   if (Opts.Sysroot != "/") {
388     Res.push_back("-isysroot");
389     Res.push_back(Opts.Sysroot);
390   }
391 
392   /// User specified include entries.
393   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
394     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
395     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
396       llvm::report_fatal_error("Invalid option set!");
397     if (E.IsUserSupplied) {
398       if (E.Group == frontend::After) {
399         Res.push_back("-idirafter");
400       } else if (E.Group == frontend::Quoted) {
401         Res.push_back("-iquote");
402       } else if (E.Group == frontend::System) {
403         Res.push_back("-isystem");
404       } else {
405         assert(E.Group == frontend::Angled && "Invalid group!");
406         Res.push_back(E.IsFramework ? "-F" : "-I");
407       }
408     } else {
409       if (E.Group != frontend::Angled && E.Group != frontend::System)
410         llvm::report_fatal_error("Invalid option set!");
411       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
412                     "-iwithprefix");
413     }
414     Res.push_back(E.Path);
415   }
416 
417   if (!Opts.EnvIncPath.empty()) {
418     // FIXME: Provide an option for this, and move env detection to driver.
419     llvm::report_fatal_error("Not yet implemented!");
420   }
421   if (!Opts.CEnvIncPath.empty()) {
422     // FIXME: Provide an option for this, and move env detection to driver.
423     llvm::report_fatal_error("Not yet implemented!");
424   }
425   if (!Opts.ObjCEnvIncPath.empty()) {
426     // FIXME: Provide an option for this, and move env detection to driver.
427     llvm::report_fatal_error("Not yet implemented!");
428   }
429   if (!Opts.CXXEnvIncPath.empty()) {
430     // FIXME: Provide an option for this, and move env detection to driver.
431     llvm::report_fatal_error("Not yet implemented!");
432   }
433   if (!Opts.ObjCXXEnvIncPath.empty()) {
434     // FIXME: Provide an option for this, and move env detection to driver.
435     llvm::report_fatal_error("Not yet implemented!");
436   }
437   if (!Opts.ResourceDir.empty()) {
438     Res.push_back("-resource-dir");
439     Res.push_back(Opts.ResourceDir);
440   }
441   if (!Opts.UseStandardIncludes)
442     Res.push_back("-nostdinc");
443   if (!Opts.UseStandardCXXIncludes)
444     Res.push_back("-nostdinc++");
445   if (Opts.Verbose)
446     Res.push_back("-v");
447 }
448 
449 static void LangOptsToArgs(const LangOptions &Opts,
450                            std::vector<std::string> &Res) {
451   LangOptions DefaultLangOpts;
452 
453   // FIXME: Need to set -std to get all the implicit options.
454 
455   // FIXME: We want to only pass options relative to the defaults, which
456   // requires constructing a target. :(
457   //
458   // It would be better to push the all target specific choices into the driver,
459   // so that everything below that was more uniform.
460 
461   if (Opts.Trigraphs)
462     Res.push_back("-trigraphs");
463   // Implicit based on the input kind:
464   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
465   // Implicit based on the input language standard:
466   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
467   if (Opts.DollarIdents)
468     Res.push_back("-fdollars-in-identifiers");
469   if (Opts.Microsoft)
470     Res.push_back("-fms-extensions");
471   if (Opts.ObjCNonFragileABI)
472     Res.push_back("-fobjc-nonfragile-abi");
473   if (Opts.ObjCNonFragileABI2)
474     Res.push_back("-fobjc-nonfragile-abi2");
475   // NoInline is implicit.
476   if (!Opts.CXXOperatorNames)
477     Res.push_back("-fno-operator-names");
478   if (Opts.PascalStrings)
479     Res.push_back("-fpascal-strings");
480   if (Opts.CatchUndefined)
481     Res.push_back("-fcatch-undefined-behavior");
482   if (Opts.WritableStrings)
483     Res.push_back("-fwritable-strings");
484   if (Opts.ConstStrings)
485     Res.push_back("-Wwrite-strings");
486   if (!Opts.LaxVectorConversions)
487     Res.push_back("-fno-lax-vector-conversions");
488   if (Opts.AltiVec)
489     Res.push_back("-faltivec");
490   if (Opts.Exceptions)
491     Res.push_back("-fexceptions");
492   if (Opts.SjLjExceptions)
493     Res.push_back("-fsjlj-exceptions");
494   if (!Opts.RTTI)
495     Res.push_back("-fno-rtti");
496   if (!Opts.NeXTRuntime)
497     Res.push_back("-fgnu-runtime");
498   if (Opts.Freestanding)
499     Res.push_back("-ffreestanding");
500   if (Opts.NoBuiltin)
501     Res.push_back("-fno-builtin");
502   if (!Opts.AssumeSaneOperatorNew)
503     Res.push_back("-fno-assume-sane-operator-new");
504   if (!Opts.ThreadsafeStatics)
505     Res.push_back("-fno-threadsafe-statics");
506   if (Opts.POSIXThreads)
507     Res.push_back("-pthread");
508   if (Opts.Blocks)
509     Res.push_back("-fblocks");
510   if (Opts.EmitAllDecls)
511     Res.push_back("-femit-all-decls");
512   if (Opts.MathErrno)
513     Res.push_back("-fmath-errno");
514   if (Opts.OverflowChecking)
515     Res.push_back("-ftrapv");
516   if (Opts.HeinousExtensions)
517     Res.push_back("-fheinous-gnu-extensions");
518   // Optimize is implicit.
519   // OptimizeSize is implicit.
520   if (Opts.Static)
521     Res.push_back("-static-define");
522   if (Opts.PICLevel) {
523     Res.push_back("-pic-level");
524     Res.push_back(llvm::utostr(Opts.PICLevel));
525   }
526   if (Opts.ObjCGCBitmapPrint)
527     Res.push_back("-print-ivar-layout");
528   // FIXME: Don't forget to update when the default changes!
529   if (Opts.AccessControl)
530     Res.push_back("-faccess-control");
531   if (!Opts.CharIsSigned)
532     Res.push_back("-fno-signed-char");
533   if (Opts.ShortWChar)
534     Res.push_back("-fshort-wchar");
535   if (!Opts.ElideConstructors)
536     Res.push_back("-fno-elide-constructors");
537   if (Opts.getGCMode() != LangOptions::NonGC) {
538     if (Opts.getGCMode() == LangOptions::HybridGC) {
539       Res.push_back("-fobjc-gc");
540     } else {
541       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
542       Res.push_back("-fobjc-gc-only");
543     }
544   }
545   if (Opts.getVisibilityMode() != LangOptions::Default) {
546     Res.push_back("-fvisibility");
547     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
548       Res.push_back("hidden");
549     } else {
550       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
551              "Invalid visibility!");
552       Res.push_back("protected");
553     }
554   }
555   if (Opts.getStackProtectorMode() != 0) {
556     Res.push_back("-stack-protector");
557     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
558   }
559   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
560     Res.push_back("-ftemplate-depth");
561     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
562   }
563   if (!Opts.ObjCConstantStringClass.empty()) {
564     Res.push_back("-fconstant-string-class");
565     Res.push_back(Opts.ObjCConstantStringClass);
566   }
567 }
568 
569 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
570                                    std::vector<std::string> &Res) {
571   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
572     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
573                   Opts.Macros[i].first);
574   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
575     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
576     Res.push_back("-include");
577     Res.push_back(Opts.Includes[i]);
578   }
579   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
580     Res.push_back("-imacros");
581     Res.push_back(Opts.MacroIncludes[i]);
582   }
583   if (!Opts.UsePredefines)
584     Res.push_back("-undef");
585   if (Opts.DetailedRecord)
586     Res.push_back("-detailed-preprocessing-record");
587   if (!Opts.ImplicitPCHInclude.empty()) {
588     Res.push_back("-include-pch");
589     Res.push_back(Opts.ImplicitPCHInclude);
590   }
591   if (!Opts.ImplicitPTHInclude.empty()) {
592     Res.push_back("-include-pth");
593     Res.push_back(Opts.ImplicitPTHInclude);
594   }
595   if (!Opts.TokenCache.empty()) {
596     if (Opts.ImplicitPTHInclude.empty()) {
597       Res.push_back("-token-cache");
598       Res.push_back(Opts.TokenCache);
599     } else
600       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
601              "Unsupported option combination!");
602   }
603   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
604     Res.push_back("-remap-file");
605     Res.push_back(Opts.RemappedFiles[i].first + ";" +
606                   Opts.RemappedFiles[i].second);
607   }
608 }
609 
610 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
611                                          std::vector<std::string> &Res) {
612   if (!Opts.ShowCPP && !Opts.ShowMacros)
613     llvm::report_fatal_error("Invalid option combination!");
614 
615   if (Opts.ShowCPP && Opts.ShowMacros)
616     Res.push_back("-dD");
617   else if (!Opts.ShowCPP && Opts.ShowMacros)
618     Res.push_back("-dM");
619 
620   if (!Opts.ShowLineMarkers)
621     Res.push_back("-P");
622   if (Opts.ShowComments)
623     Res.push_back("-C");
624   if (Opts.ShowMacroComments)
625     Res.push_back("-CC");
626 }
627 
628 static void TargetOptsToArgs(const TargetOptions &Opts,
629                              std::vector<std::string> &Res) {
630   Res.push_back("-triple");
631   Res.push_back(Opts.Triple);
632   if (!Opts.CPU.empty()) {
633     Res.push_back("-target-cpu");
634     Res.push_back(Opts.CPU);
635   }
636   if (!Opts.ABI.empty()) {
637     Res.push_back("-target-abi");
638     Res.push_back(Opts.ABI);
639   }
640   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
641     Res.push_back("-target-feature");
642     Res.push_back(Opts.Features[i]);
643   }
644 }
645 
646 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
647   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
648   CodeGenOptsToArgs(getCodeGenOpts(), Res);
649   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
650   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
651   FrontendOptsToArgs(getFrontendOpts(), Res);
652   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
653   LangOptsToArgs(getLangOpts(), Res);
654   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
655   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
656   TargetOptsToArgs(getTargetOpts(), Res);
657 }
658 
659 //===----------------------------------------------------------------------===//
660 // Deserialization (to args)
661 //===----------------------------------------------------------------------===//
662 
663 using namespace clang::driver;
664 using namespace clang::driver::cc1options;
665 
666 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
667                                        llvm::StringRef Default = "") {
668   if (Arg *A = Args.getLastArg(ID))
669     return A->getValue(Args);
670   return Default;
671 }
672 
673 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
674                               int Default, Diagnostic &Diags) {
675   Arg *A = Args.getLastArg(ID);
676   if (!A)
677     return Default;
678 
679   int Res = Default;
680   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
681     Diags.Report(diag::err_drv_invalid_int_value)
682         << A->getAsString(Args) << A->getValue(Args);
683 
684   return Res;
685 }
686 
687 static std::vector<std::string>
688 getAllArgValues(ArgList &Args, cc1options::ID ID) {
689   llvm::SmallVector<const char *, 16> Values;
690   Args.AddAllArgValues(Values, ID);
691   return std::vector<std::string>(Values.begin(), Values.end());
692 }
693 
694 //
695 
696 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
697                               Diagnostic &Diags) {
698   using namespace cc1options;
699 
700   Opts.AnalysisList.clear();
701 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
702   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
703 #include "clang/Frontend/Analyses.def"
704 
705   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
706     llvm::StringRef Name = A->getValue(Args);
707     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
708 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
709       .Case(CMDFLAG, NAME##Model)
710 #include "clang/Frontend/Analyses.def"
711       .Default(NumStores);
712     // FIXME: Error handling.
713     if (Value == NumStores)
714       Diags.Report(diag::err_drv_invalid_value)
715         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
716     else
717       Opts.AnalysisStoreOpt = Value;
718   }
719 
720   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
721     llvm::StringRef Name = A->getValue(Args);
722     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
723 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
724       .Case(CMDFLAG, NAME##Model)
725 #include "clang/Frontend/Analyses.def"
726       .Default(NumConstraints);
727     // FIXME: Error handling.
728     if (Value == NumConstraints)
729       Diags.Report(diag::err_drv_invalid_value)
730         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
731     else
732       Opts.AnalysisConstraintsOpt = Value;
733   }
734 
735   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
736     llvm::StringRef Name = A->getValue(Args);
737     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
738 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
739       .Case(CMDFLAG, PD_##NAME)
740 #include "clang/Frontend/Analyses.def"
741       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
742     // FIXME: Error handling.
743     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
744       Diags.Report(diag::err_drv_invalid_value)
745         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
746     else
747       Opts.AnalysisDiagOpt = Value;
748   }
749 
750   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
751   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
752   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
753   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
754   Opts.AnalyzeNestedBlocks =
755     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
756   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
757   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
758   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
759   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
760   Opts.EnableExperimentalInternalChecks =
761     Args.hasArg(OPT_analyzer_experimental_internal_checks);
762   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
763 }
764 
765 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
766                              Diagnostic &Diags) {
767   using namespace cc1options;
768   // -Os implies -O2
769   if (Args.hasArg(OPT_Os))
770     Opts.OptimizationLevel = 2;
771   else {
772     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
773     if (Opts.OptimizationLevel > 3) {
774       Diags.Report(diag::err_drv_invalid_value)
775         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
776       Opts.OptimizationLevel = 3;
777     }
778   }
779 
780   // We must always run at least the always inlining pass.
781   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
782     : CodeGenOptions::OnlyAlwaysInlining;
783 
784   Opts.DebugInfo = Args.hasArg(OPT_g);
785   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
786   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
787   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
788   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
789   Opts.NoCommon = Args.hasArg(OPT_fno_common);
790   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
791   Opts.OptimizeSize = Args.hasArg(OPT_Os);
792   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
793 
794   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
795   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
796   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
797   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
798   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
799   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
800   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
801   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
802   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
803   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
804   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
805   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
806   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
807 
808   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
809   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
810 }
811 
812 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
813                                       ArgList &Args) {
814   using namespace cc1options;
815   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
816   Opts.Targets = getAllArgValues(Args, OPT_MT);
817   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
818   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
819 }
820 
821 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
822                                 Diagnostic &Diags) {
823   using namespace cc1options;
824   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
825   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
826   Opts.Pedantic = Args.hasArg(OPT_pedantic);
827   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
828   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
829   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
830   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
831   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
832   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
833   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
834   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
835   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
836   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
837   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
838   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
839                                     DiagnosticOptions::DefaultTabStop, Diags);
840   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
841     Diags.Report(diag::warn_ignoring_ftabstop_value)
842       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
843     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
844   }
845   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
846   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
847   Opts.Warnings = getAllArgValues(Args, OPT_W);
848 }
849 
850 static FrontendOptions::InputKind
851 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
852   using namespace cc1options;
853   Opts.ProgramAction = frontend::ParseSyntaxOnly;
854   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
855     switch (A->getOption().getID()) {
856     default:
857       assert(0 && "Invalid option in group!");
858     case OPT_ast_dump:
859       Opts.ProgramAction = frontend::ASTDump; break;
860     case OPT_ast_print:
861       Opts.ProgramAction = frontend::ASTPrint; break;
862     case OPT_ast_print_xml:
863       Opts.ProgramAction = frontend::ASTPrintXML; break;
864     case OPT_ast_view:
865       Opts.ProgramAction = frontend::ASTView; break;
866     case OPT_dump_raw_tokens:
867       Opts.ProgramAction = frontend::DumpRawTokens; break;
868     case OPT_dump_record_layouts:
869       Opts.ProgramAction = frontend::DumpRecordLayouts; break;
870     case OPT_dump_tokens:
871       Opts.ProgramAction = frontend::DumpTokens; break;
872     case OPT_S:
873       Opts.ProgramAction = frontend::EmitAssembly; break;
874     case OPT_emit_llvm_bc:
875       Opts.ProgramAction = frontend::EmitBC; break;
876     case OPT_emit_html:
877       Opts.ProgramAction = frontend::EmitHTML; break;
878     case OPT_emit_llvm:
879       Opts.ProgramAction = frontend::EmitLLVM; break;
880     case OPT_emit_llvm_only:
881       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
882     case OPT_emit_obj:
883       Opts.ProgramAction = frontend::EmitObj; break;
884     case OPT_fixit:
885       Opts.ProgramAction = frontend::FixIt; break;
886     case OPT_emit_pch:
887       Opts.ProgramAction = frontend::GeneratePCH; break;
888     case OPT_emit_pth:
889       Opts.ProgramAction = frontend::GeneratePTH; break;
890     case OPT_init_only:
891       Opts.ProgramAction = frontend::InitOnly; break;
892     case OPT_parse_noop:
893       Opts.ProgramAction = frontend::ParseNoop; break;
894     case OPT_parse_print_callbacks:
895       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
896     case OPT_fsyntax_only:
897       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
898     case OPT_print_decl_contexts:
899       Opts.ProgramAction = frontend::PrintDeclContext; break;
900     case OPT_E:
901       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
902     case OPT_rewrite_macros:
903       Opts.ProgramAction = frontend::RewriteMacros; break;
904     case OPT_rewrite_objc:
905       Opts.ProgramAction = frontend::RewriteObjC; break;
906     case OPT_rewrite_test:
907       Opts.ProgramAction = frontend::RewriteTest; break;
908     case OPT_analyze:
909       Opts.ProgramAction = frontend::RunAnalysis; break;
910     case OPT_Eonly:
911       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
912     }
913   }
914   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
915     Opts.ProgramAction = frontend::PluginAction;
916     Opts.ActionName = A->getValue(Args);
917   }
918 
919   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
920     Opts.CodeCompletionAt =
921       ParsedSourceLocation::FromString(A->getValue(Args));
922     if (Opts.CodeCompletionAt.FileName.empty())
923       Diags.Report(diag::err_drv_invalid_value)
924         << A->getAsString(Args) << A->getValue(Args);
925   }
926   Opts.DebugCodeCompletionPrinter =
927     !Args.hasArg(OPT_no_code_completion_debug_printer);
928   Opts.DisableFree = Args.hasArg(OPT_disable_free);
929 
930   Opts.FixItLocations.clear();
931   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
932          ie = Args.filtered_end(); it != ie; ++it) {
933     const char *Loc = it->getValue(Args);
934     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
935 
936     if (PSL.FileName.empty()) {
937       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
938       continue;
939     }
940 
941     Opts.FixItLocations.push_back(PSL);
942   }
943 
944   Opts.OutputFile = getLastArgValue(Args, OPT_o);
945   Opts.Plugins = getAllArgValues(Args, OPT_load);
946   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
947   Opts.ShowHelp = Args.hasArg(OPT_help);
948   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
949   Opts.ShowStats = Args.hasArg(OPT_print_stats);
950   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
951   Opts.ShowVersion = Args.hasArg(OPT_version);
952   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
953   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
954 
955   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
956   if (const Arg *A = Args.getLastArg(OPT_x)) {
957     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
958       .Case("c", FrontendOptions::IK_C)
959       .Case("cl", FrontendOptions::IK_OpenCL)
960       .Case("c", FrontendOptions::IK_C)
961       .Case("cl", FrontendOptions::IK_OpenCL)
962       .Case("c++", FrontendOptions::IK_CXX)
963       .Case("objective-c", FrontendOptions::IK_ObjC)
964       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
965       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
966       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
967       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
968       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
969       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
970       .Case("c-header", FrontendOptions::IK_C)
971       .Case("objective-c-header", FrontendOptions::IK_ObjC)
972       .Case("c++-header", FrontendOptions::IK_CXX)
973       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
974       .Case("ast", FrontendOptions::IK_AST)
975       .Default(FrontendOptions::IK_None);
976     if (DashX == FrontendOptions::IK_None)
977       Diags.Report(diag::err_drv_invalid_value)
978         << A->getAsString(Args) << A->getValue(Args);
979   }
980 
981   // '-' is the default input if none is given.
982   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
983   Opts.Inputs.clear();
984   if (Inputs.empty())
985     Inputs.push_back("-");
986   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
987     FrontendOptions::InputKind IK = DashX;
988     if (IK == FrontendOptions::IK_None) {
989       IK = FrontendOptions::getInputKindForExtension(
990         llvm::StringRef(Inputs[i]).rsplit('.').second);
991       // FIXME: Remove this hack.
992       if (i == 0)
993         DashX = IK;
994     }
995     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
996   }
997 
998   return DashX;
999 }
1000 
1001 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1002                                                  void *MainAddr) {
1003   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1004 
1005   if (!P.isEmpty()) {
1006     P.eraseComponent();  // Remove /clang from foo/bin/clang
1007     P.eraseComponent();  // Remove /bin   from foo/bin
1008 
1009     // Get foo/lib/clang/<version>/include
1010     P.appendComponent("lib");
1011     P.appendComponent("clang");
1012     P.appendComponent(CLANG_VERSION_STRING);
1013   }
1014 
1015   return P.str();
1016 }
1017 
1018 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1019   using namespace cc1options;
1020   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1021   Opts.Verbose = Args.hasArg(OPT_v);
1022   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1023   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1024   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1025   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1026 
1027   // Add -I... and -F... options in order.
1028   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1029          ie = Args.filtered_end(); it != ie; ++it)
1030     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1031                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1032 
1033   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1034   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1035   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1036                                              OPT_iwithprefixbefore),
1037          ie = Args.filtered_end(); it != ie; ++it) {
1038     if (it->getOption().matches(OPT_iprefix))
1039       Prefix = it->getValue(Args);
1040     else if (it->getOption().matches(OPT_iwithprefix))
1041       Opts.AddPath(Prefix.str() + it->getValue(Args),
1042                    frontend::System, false, false);
1043     else
1044       Opts.AddPath(Prefix.str() + it->getValue(Args),
1045                    frontend::Angled, false, false);
1046   }
1047 
1048   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1049          ie = Args.filtered_end(); it != ie; ++it)
1050     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1051   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1052          ie = Args.filtered_end(); it != ie; ++it)
1053     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1054   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1055          ie = Args.filtered_end(); it != ie; ++it)
1056     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1057 
1058   // FIXME: Need options for the various environment variables!
1059 }
1060 
1061 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1062                           FrontendOptions::InputKind IK,
1063                           Diagnostic &Diags) {
1064   // FIXME: Cleanup per-file based stuff.
1065 
1066   // Set some properties which depend soley on the input kind; it would be nice
1067   // to move these to the language standard, and have the driver resolve the
1068   // input kind + language standard.
1069   if (IK == FrontendOptions::IK_Asm) {
1070     Opts.AsmPreprocessor = 1;
1071   } else if (IK == FrontendOptions::IK_ObjC ||
1072              IK == FrontendOptions::IK_ObjCXX ||
1073              IK == FrontendOptions::IK_PreprocessedObjC ||
1074              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1075     Opts.ObjC1 = Opts.ObjC2 = 1;
1076   }
1077 
1078   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1079   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1080     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1081 #define LANGSTANDARD(id, name, desc, features) \
1082       .Case(name, LangStandard::lang_##id)
1083 #include "clang/Frontend/LangStandards.def"
1084       .Default(LangStandard::lang_unspecified);
1085     if (LangStd == LangStandard::lang_unspecified)
1086       Diags.Report(diag::err_drv_invalid_value)
1087         << A->getAsString(Args) << A->getValue(Args);
1088   }
1089 
1090   if (LangStd == LangStandard::lang_unspecified) {
1091     // Based on the base language, pick one.
1092     switch (IK) {
1093     case FrontendOptions::IK_None:
1094     case FrontendOptions::IK_AST:
1095       assert(0 && "Invalid input kind!");
1096     case FrontendOptions::IK_OpenCL:
1097       LangStd = LangStandard::lang_opencl;
1098       break;
1099     case FrontendOptions::IK_Asm:
1100     case FrontendOptions::IK_C:
1101     case FrontendOptions::IK_PreprocessedC:
1102     case FrontendOptions::IK_ObjC:
1103     case FrontendOptions::IK_PreprocessedObjC:
1104       LangStd = LangStandard::lang_gnu99;
1105       break;
1106     case FrontendOptions::IK_CXX:
1107     case FrontendOptions::IK_PreprocessedCXX:
1108     case FrontendOptions::IK_ObjCXX:
1109     case FrontendOptions::IK_PreprocessedObjCXX:
1110       LangStd = LangStandard::lang_gnucxx98;
1111       break;
1112     }
1113   }
1114 
1115   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1116   Opts.BCPLComment = Std.hasBCPLComments();
1117   Opts.C99 = Std.isC99();
1118   Opts.CPlusPlus = Std.isCPlusPlus();
1119   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1120   Opts.Digraphs = Std.hasDigraphs();
1121   Opts.GNUMode = Std.isGNUMode();
1122   Opts.GNUInline = !Std.isC99();
1123   Opts.HexFloats = Std.hasHexFloats();
1124   Opts.ImplicitInt = Std.hasImplicitInt();
1125 
1126   // OpenCL has some additional defaults.
1127   if (LangStd == LangStandard::lang_opencl) {
1128     Opts.OpenCL = 1;
1129     Opts.AltiVec = 1;
1130     Opts.CXXOperatorNames = 1;
1131     Opts.LaxVectorConversions = 1;
1132   }
1133 
1134   // OpenCL and C++ both have bool, true, false keywords.
1135   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1136 
1137   if (Opts.CPlusPlus)
1138     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1139 
1140   if (Args.hasArg(OPT_fobjc_gc_only))
1141     Opts.setGCMode(LangOptions::GCOnly);
1142   else if (Args.hasArg(OPT_fobjc_gc))
1143     Opts.setGCMode(LangOptions::HybridGC);
1144 
1145   if (Args.hasArg(OPT_print_ivar_layout))
1146     Opts.ObjCGCBitmapPrint = 1;
1147 
1148   if (Args.hasArg(OPT_faltivec))
1149     Opts.AltiVec = 1;
1150 
1151   if (Args.hasArg(OPT_pthread))
1152     Opts.POSIXThreads = 1;
1153 
1154   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1155                                         "default");
1156   if (Vis == "default")
1157     Opts.setVisibilityMode(LangOptions::Default);
1158   else if (Vis == "hidden")
1159     Opts.setVisibilityMode(LangOptions::Hidden);
1160   else if (Vis == "protected")
1161     Opts.setVisibilityMode(LangOptions::Protected);
1162   else
1163     Diags.Report(diag::err_drv_invalid_value)
1164       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1165 
1166   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1167 
1168   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1169   // is specified, or -std is set to a conforming mode.
1170   Opts.Trigraphs = !Opts.GNUMode;
1171   if (Args.hasArg(OPT_trigraphs))
1172     Opts.Trigraphs = 1;
1173 
1174   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1175                                    OPT_fno_dollars_in_identifiers,
1176                                    !Opts.AsmPreprocessor);
1177   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1178   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1179   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1180   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1181   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1182     Opts.LaxVectorConversions = 0;
1183   if (Args.hasArg(OPT_fno_threadsafe_statics))
1184     Opts.ThreadsafeStatics = 0;
1185   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1186   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1187   Opts.Blocks = Args.hasArg(OPT_fblocks);
1188   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1189   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1190   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1191   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1192   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1193   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1194   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1195   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1196   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1197   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1198                                                Diags);
1199   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1200   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1201                                                  OPT_fconstant_string_class);
1202   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1203   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1204   if (Opts.ObjCNonFragileABI2)
1205     Opts.ObjCNonFragileABI = true;
1206   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1207   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1208   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1209   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1210   Opts.Static = Args.hasArg(OPT_static_define);
1211   Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1212   Opts.OptimizeSize = 0;
1213 
1214   // FIXME: Eliminate this dependency.
1215   unsigned Opt =
1216     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1217   Opts.Optimize = Opt != 0;
1218 
1219   // This is the __NO_INLINE__ define, which just depends on things like the
1220   // optimization level and -fno-inline, not actually whether the backend has
1221   // inlining enabled.
1222   //
1223   // FIXME: This is affected by other options (-fno-inline).
1224   Opts.NoInline = !Opt;
1225 
1226   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1227   switch (SSP) {
1228   default:
1229     Diags.Report(diag::err_drv_invalid_value)
1230       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1231     break;
1232   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1233   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1234   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1235   }
1236 }
1237 
1238 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1239                                   Diagnostic &Diags) {
1240   using namespace cc1options;
1241   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1242   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1243   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1244       Opts.TokenCache = A->getValue(Args);
1245   else
1246     Opts.TokenCache = Opts.ImplicitPTHInclude;
1247   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1248   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1249   // Add macros from the command line.
1250   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1251          ie = Args.filtered_end(); it != ie; ++it) {
1252     if (it->getOption().matches(OPT_D))
1253       Opts.addMacroDef(it->getValue(Args));
1254     else
1255       Opts.addMacroUndef(it->getValue(Args));
1256   }
1257 
1258   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1259 
1260   // Add the ordered list of -includes.
1261   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1262                                              OPT_include_pth),
1263          ie = Args.filtered_end(); it != ie; ++it) {
1264     // PCH is handled specially, we need to extra the original include path.
1265     if (it->getOption().matches(OPT_include_pch)) {
1266       std::string OriginalFile =
1267         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1268       if (OriginalFile.empty())
1269         continue;
1270 
1271       Opts.Includes.push_back(OriginalFile);
1272     } else
1273       Opts.Includes.push_back(it->getValue(Args));
1274   }
1275 
1276   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1277          ie = Args.filtered_end(); it != ie; ++it) {
1278     std::pair<llvm::StringRef,llvm::StringRef> Split =
1279       llvm::StringRef(it->getValue(Args)).split(';');
1280 
1281     if (Split.second.empty()) {
1282       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1283       continue;
1284     }
1285 
1286     Opts.addRemappedFile(Split.first, Split.second);
1287   }
1288 }
1289 
1290 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1291                                         ArgList &Args) {
1292   using namespace cc1options;
1293   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1294   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1295   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1296   Opts.ShowComments = Args.hasArg(OPT_C);
1297   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1298 }
1299 
1300 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1301   using namespace cc1options;
1302   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1303   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1304   Opts.Triple = getLastArgValue(Args, OPT_triple);
1305   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1306 
1307   // Use the host triple if unspecified.
1308   if (Opts.Triple.empty())
1309     Opts.Triple = llvm::sys::getHostTriple();
1310 }
1311 
1312 //
1313 
1314 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1315                                         const char **ArgBegin,
1316                                         const char **ArgEnd,
1317                                         Diagnostic &Diags) {
1318   // Parse the arguments.
1319   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1320   unsigned MissingArgIndex, MissingArgCount;
1321   llvm::OwningPtr<InputArgList> Args(
1322     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1323 
1324   // Check for missing argument error.
1325   if (MissingArgCount)
1326     Diags.Report(diag::err_drv_missing_argument)
1327       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1328 
1329   // Issue errors on unknown arguments.
1330   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1331          ie = Args->filtered_end(); it != ie; ++it)
1332     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1333 
1334   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1335   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1336   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1337   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1338   FrontendOptions::InputKind DashX =
1339     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1340   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1341   if (DashX != FrontendOptions::IK_AST)
1342     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1343   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1344   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1345   ParseTargetArgs(Res.getTargetOpts(), *Args);
1346 }
1347